From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 9 Oct 2003 23:53:03 -0800 From: Ethan Benson To: LinuxPPC Developers Subject: Re: Time precision, adjtime(x) vs. gettimeofday Message-ID: <20031010075302.GT2828@plato.local.lan> References: <20031010011254.078c84a8.billfink@mindspring.com> Mime-Version: 1.0 In-Reply-To: <20031010011254.078c84a8.billfink@mindspring.com> Content-Type: text/plain; charset=us-ascii Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: On Fri, Oct 10, 2003 at 01:12:54AM -0400, Bill Fink wrote: > > This discussion prompted me to finally ask about another clock related > problem I see on the 867 MHz G4 systems at work. The clocks on > these systems continuously run 0.2% slow (about 3 minutes per day). > Apparently this is more than ntp can adjust for (using scaling), as I > get many of these error messages in the log: is it a quicksilver G4? i maintain one of those and its time goes off much faster then that (3 minutes within a couple hours). the fix is rather simple: --- linux.old/arch/ppc/platforms/pmac_time.c.orig Sat Nov 30 02:33:49 2002 +++ linux/arch/ppc/platforms/pmac_time.c Sat Nov 30 02:33:22 2002 @@ -262,7 +262,9 @@ * calibration. That's better since the VIA itself seems * to be slightly off. --BenH */ +#if 0 if (!machine_is_compatible("MacRISC2")) +#endif if (via_calibrate_decr()) return; in the case of the quicksilver VIA is FAR better then whatever it uses instead. -- Ethan Benson http://www.alaska.net/~erbenson/ ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/